./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-industry-pattern/nested-3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-industry-pattern/nested-3.c -s /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5cc43240abf98c80d290003c5624d57848fccfa1 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 14:05:24,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 14:05:24,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 14:05:24,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 14:05:24,041 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 14:05:24,042 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 14:05:24,042 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 14:05:24,044 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 14:05:24,045 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 14:05:24,046 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 14:05:24,046 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 14:05:24,047 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 14:05:24,047 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 14:05:24,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 14:05:24,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 14:05:24,049 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 14:05:24,050 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 14:05:24,051 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 14:05:24,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 14:05:24,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 14:05:24,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 14:05:24,055 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 14:05:24,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 14:05:24,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 14:05:24,058 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 14:05:24,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 14:05:24,058 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 14:05:24,059 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 14:05:24,059 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 14:05:24,060 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 14:05:24,060 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 14:05:24,060 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 14:05:24,061 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 14:05:24,061 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 14:05:24,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 14:05:24,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 14:05:24,062 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 14:05:24,062 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 14:05:24,062 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 14:05:24,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 14:05:24,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 14:05:24,064 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 14:05:24,073 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 14:05:24,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 14:05:24,074 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 14:05:24,074 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 14:05:24,074 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 14:05:24,074 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 14:05:24,074 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 14:05:24,074 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 14:05:24,074 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 14:05:24,074 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 14:05:24,074 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 14:05:24,075 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 14:05:24,075 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 14:05:24,075 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 14:05:24,075 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 14:05:24,075 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 14:05:24,075 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 14:05:24,075 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 14:05:24,075 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 14:05:24,075 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 14:05:24,076 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 14:05:24,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 14:05:24,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 14:05:24,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 14:05:24,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 14:05:24,076 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 14:05:24,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 14:05:24,076 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 14:05:24,076 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 14:05:24,076 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5cc43240abf98c80d290003c5624d57848fccfa1 [2019-12-07 14:05:24,175 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 14:05:24,182 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 14:05:24,184 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 14:05:24,185 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 14:05:24,185 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 14:05:24,186 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/../../sv-benchmarks/c/loop-industry-pattern/nested-3.c [2019-12-07 14:05:24,222 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/data/6494dc04f/ceb64e9025bb4603bcde14240dcf8536/FLAGa296e0baf [2019-12-07 14:05:24,625 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 14:05:24,626 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/sv-benchmarks/c/loop-industry-pattern/nested-3.c [2019-12-07 14:05:24,629 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/data/6494dc04f/ceb64e9025bb4603bcde14240dcf8536/FLAGa296e0baf [2019-12-07 14:05:24,638 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/data/6494dc04f/ceb64e9025bb4603bcde14240dcf8536 [2019-12-07 14:05:24,640 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 14:05:24,641 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 14:05:24,641 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 14:05:24,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 14:05:24,643 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 14:05:24,644 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 02:05:24" (1/1) ... [2019-12-07 14:05:24,646 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33ad0b57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:05:24, skipping insertion in model container [2019-12-07 14:05:24,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 02:05:24" (1/1) ... [2019-12-07 14:05:24,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 14:05:24,661 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 14:05:24,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 14:05:24,762 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 14:05:24,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 14:05:24,817 INFO L208 MainTranslator]: Completed translation [2019-12-07 14:05:24,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:05:24 WrapperNode [2019-12-07 14:05:24,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 14:05:24,818 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 14:05:24,819 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 14:05:24,819 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 14:05:24,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:05:24" (1/1) ... [2019-12-07 14:05:24,828 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:05:24" (1/1) ... [2019-12-07 14:05:24,841 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 14:05:24,841 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 14:05:24,841 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 14:05:24,841 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 14:05:24,847 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:05:24" (1/1) ... [2019-12-07 14:05:24,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:05:24" (1/1) ... [2019-12-07 14:05:24,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:05:24" (1/1) ... [2019-12-07 14:05:24,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:05:24" (1/1) ... [2019-12-07 14:05:24,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:05:24" (1/1) ... [2019-12-07 14:05:24,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:05:24" (1/1) ... [2019-12-07 14:05:24,853 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:05:24" (1/1) ... [2019-12-07 14:05:24,854 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 14:05:24,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 14:05:24,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 14:05:24,855 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 14:05:24,856 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:05:24" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 14:05:24,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 14:05:24,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 14:05:25,016 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 14:05:25,016 INFO L287 CfgBuilder]: Removed 8 assume(true) statements. [2019-12-07 14:05:25,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:05:25 BoogieIcfgContainer [2019-12-07 14:05:25,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 14:05:25,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 14:05:25,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 14:05:25,020 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 14:05:25,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 02:05:24" (1/3) ... [2019-12-07 14:05:25,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@405d1393 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 02:05:25, skipping insertion in model container [2019-12-07 14:05:25,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:05:24" (2/3) ... [2019-12-07 14:05:25,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@405d1393 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 02:05:25, skipping insertion in model container [2019-12-07 14:05:25,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:05:25" (3/3) ... [2019-12-07 14:05:25,023 INFO L109 eAbstractionObserver]: Analyzing ICFG nested-3.c [2019-12-07 14:05:25,031 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 14:05:25,037 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 14:05:25,045 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 14:05:25,059 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 14:05:25,059 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 14:05:25,059 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 14:05:25,060 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 14:05:25,060 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 14:05:25,060 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 14:05:25,060 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 14:05:25,060 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 14:05:25,069 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-12-07 14:05:25,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 14:05:25,072 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:05:25,073 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:05:25,073 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:05:25,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:05:25,077 INFO L82 PathProgramCache]: Analyzing trace with hash 684167869, now seen corresponding path program 1 times [2019-12-07 14:05:25,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:05:25,082 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152977283] [2019-12-07 14:05:25,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:05:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:25,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:05:25,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152977283] [2019-12-07 14:05:25,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:05:25,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 14:05:25,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805577777] [2019-12-07 14:05:25,178 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 14:05:25,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:05:25,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 14:05:25,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 14:05:25,189 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2019-12-07 14:05:25,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:05:25,229 INFO L93 Difference]: Finished difference Result 29 states and 49 transitions. [2019-12-07 14:05:25,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 14:05:25,230 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-12-07 14:05:25,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:05:25,237 INFO L225 Difference]: With dead ends: 29 [2019-12-07 14:05:25,237 INFO L226 Difference]: Without dead ends: 16 [2019-12-07 14:05:25,239 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 14:05:25,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-12-07 14:05:25,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2019-12-07 14:05:25,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-12-07 14:05:25,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2019-12-07 14:05:25,260 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 9 [2019-12-07 14:05:25,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:05:25,260 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2019-12-07 14:05:25,260 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 14:05:25,260 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2019-12-07 14:05:25,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 14:05:25,260 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:05:25,260 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:05:25,261 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:05:25,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:05:25,261 INFO L82 PathProgramCache]: Analyzing trace with hash 68919620, now seen corresponding path program 1 times [2019-12-07 14:05:25,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:05:25,261 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375062928] [2019-12-07 14:05:25,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:05:25,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:05:25,287 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375062928] [2019-12-07 14:05:25,288 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122983029] [2019-12-07 14:05:25,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:25,318 INFO L264 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 14:05:25,322 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:05:25,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 14:05:25,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 14:05:25,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2019-12-07 14:05:25,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440422760] [2019-12-07 14:05:25,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 14:05:25,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:05:25,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 14:05:25,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 14:05:25,342 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand 3 states. [2019-12-07 14:05:25,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:05:25,366 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2019-12-07 14:05:25,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 14:05:25,367 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-12-07 14:05:25,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:05:25,367 INFO L225 Difference]: With dead ends: 30 [2019-12-07 14:05:25,368 INFO L226 Difference]: Without dead ends: 19 [2019-12-07 14:05:25,368 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 14:05:25,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-12-07 14:05:25,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2019-12-07 14:05:25,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-12-07 14:05:25,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2019-12-07 14:05:25,372 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 12 [2019-12-07 14:05:25,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:05:25,372 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2019-12-07 14:05:25,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 14:05:25,372 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2019-12-07 14:05:25,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 14:05:25,373 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:05:25,373 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:05:25,573 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:25,574 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:05:25,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:05:25,574 INFO L82 PathProgramCache]: Analyzing trace with hash 68979202, now seen corresponding path program 1 times [2019-12-07 14:05:25,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:05:25,575 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830402843] [2019-12-07 14:05:25,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:05:25,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:25,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:05:25,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830402843] [2019-12-07 14:05:25,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156958488] [2019-12-07 14:05:25,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:25,646 INFO L264 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 14:05:25,647 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:05:25,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:05:25,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:05:25,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2019-12-07 14:05:25,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852386377] [2019-12-07 14:05:25,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 14:05:25,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:05:25,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 14:05:25,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 14:05:25,651 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand 4 states. [2019-12-07 14:05:25,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:05:25,680 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2019-12-07 14:05:25,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 14:05:25,681 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-12-07 14:05:25,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:05:25,681 INFO L225 Difference]: With dead ends: 32 [2019-12-07 14:05:25,681 INFO L226 Difference]: Without dead ends: 20 [2019-12-07 14:05:25,682 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 14:05:25,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-12-07 14:05:25,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2019-12-07 14:05:25,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-12-07 14:05:25,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2019-12-07 14:05:25,685 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 12 [2019-12-07 14:05:25,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:05:25,686 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2019-12-07 14:05:25,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 14:05:25,686 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2019-12-07 14:05:25,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 14:05:25,686 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:05:25,687 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:05:25,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:25,888 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:05:25,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:05:25,888 INFO L82 PathProgramCache]: Analyzing trace with hash 2128812571, now seen corresponding path program 2 times [2019-12-07 14:05:25,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:05:25,889 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835252487] [2019-12-07 14:05:25,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:05:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:05:25,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835252487] [2019-12-07 14:05:25,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899448711] [2019-12-07 14:05:25,961 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:25,981 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 14:05:25,981 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:05:25,981 INFO L264 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 14:05:25,982 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:05:25,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 14:05:25,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:05:25,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2019-12-07 14:05:25,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796895179] [2019-12-07 14:05:26,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 14:05:26,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:05:26,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 14:05:26,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-12-07 14:05:26,001 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand 9 states. [2019-12-07 14:05:26,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:05:26,129 INFO L93 Difference]: Finished difference Result 68 states and 91 transitions. [2019-12-07 14:05:26,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 14:05:26,129 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2019-12-07 14:05:26,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:05:26,130 INFO L225 Difference]: With dead ends: 68 [2019-12-07 14:05:26,130 INFO L226 Difference]: Without dead ends: 53 [2019-12-07 14:05:26,131 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-07 14:05:26,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-07 14:05:26,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 29. [2019-12-07 14:05:26,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-07 14:05:26,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2019-12-07 14:05:26,135 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 15 [2019-12-07 14:05:26,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:05:26,135 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2019-12-07 14:05:26,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 14:05:26,136 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2019-12-07 14:05:26,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 14:05:26,136 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:05:26,136 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:05:26,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:26,337 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:05:26,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:05:26,337 INFO L82 PathProgramCache]: Analyzing trace with hash 2130659613, now seen corresponding path program 1 times [2019-12-07 14:05:26,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:05:26,337 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087560710] [2019-12-07 14:05:26,337 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:05:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:26,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:05:26,361 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087560710] [2019-12-07 14:05:26,361 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344074984] [2019-12-07 14:05:26,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:26,382 INFO L264 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 14:05:26,383 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:05:26,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:05:26,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 14:05:26,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2019-12-07 14:05:26,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445561901] [2019-12-07 14:05:26,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 14:05:26,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:05:26,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 14:05:26,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-12-07 14:05:26,403 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 4 states. [2019-12-07 14:05:26,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:05:26,427 INFO L93 Difference]: Finished difference Result 83 states and 108 transitions. [2019-12-07 14:05:26,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 14:05:26,428 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-12-07 14:05:26,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:05:26,428 INFO L225 Difference]: With dead ends: 83 [2019-12-07 14:05:26,429 INFO L226 Difference]: Without dead ends: 56 [2019-12-07 14:05:26,429 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-12-07 14:05:26,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-12-07 14:05:26,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 38. [2019-12-07 14:05:26,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-07 14:05:26,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2019-12-07 14:05:26,434 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 15 [2019-12-07 14:05:26,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:05:26,434 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2019-12-07 14:05:26,434 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 14:05:26,434 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2019-12-07 14:05:26,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 14:05:26,435 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:05:26,435 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:05:26,636 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:26,636 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:05:26,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:05:26,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1321312987, now seen corresponding path program 1 times [2019-12-07 14:05:26,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:05:26,638 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683800060] [2019-12-07 14:05:26,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:05:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:26,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:05:26,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683800060] [2019-12-07 14:05:26,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321404679] [2019-12-07 14:05:26,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:26,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:26,684 INFO L264 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 14:05:26,685 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:05:26,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:05:26,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:05:26,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2019-12-07 14:05:26,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766227372] [2019-12-07 14:05:26,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 14:05:26,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:05:26,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 14:05:26,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-07 14:05:26,689 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand 5 states. [2019-12-07 14:05:26,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:05:26,717 INFO L93 Difference]: Finished difference Result 94 states and 126 transitions. [2019-12-07 14:05:26,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 14:05:26,718 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-12-07 14:05:26,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:05:26,718 INFO L225 Difference]: With dead ends: 94 [2019-12-07 14:05:26,718 INFO L226 Difference]: Without dead ends: 58 [2019-12-07 14:05:26,719 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-07 14:05:26,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-12-07 14:05:26,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2019-12-07 14:05:26,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-12-07 14:05:26,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2019-12-07 14:05:26,724 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 15 [2019-12-07 14:05:26,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:05:26,724 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2019-12-07 14:05:26,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 14:05:26,724 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2019-12-07 14:05:26,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-07 14:05:26,725 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:05:26,725 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:05:26,925 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:26,925 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:05:26,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:05:26,926 INFO L82 PathProgramCache]: Analyzing trace with hash 25548196, now seen corresponding path program 2 times [2019-12-07 14:05:26,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:05:26,926 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076465107] [2019-12-07 14:05:26,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:05:26,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:26,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:05:26,955 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076465107] [2019-12-07 14:05:26,955 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2720981] [2019-12-07 14:05:26,955 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:26,975 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 14:05:26,976 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:05:26,976 INFO L264 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 14:05:26,977 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:05:26,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:05:26,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:05:26,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-12-07 14:05:26,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190104845] [2019-12-07 14:05:26,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 14:05:26,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:05:26,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 14:05:26,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-12-07 14:05:26,982 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand 6 states. [2019-12-07 14:05:27,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:05:27,020 INFO L93 Difference]: Finished difference Result 117 states and 153 transitions. [2019-12-07 14:05:27,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 14:05:27,020 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-12-07 14:05:27,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:05:27,021 INFO L225 Difference]: With dead ends: 117 [2019-12-07 14:05:27,021 INFO L226 Difference]: Without dead ends: 70 [2019-12-07 14:05:27,021 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-12-07 14:05:27,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-12-07 14:05:27,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 61. [2019-12-07 14:05:27,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-12-07 14:05:27,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2019-12-07 14:05:27,027 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 18 [2019-12-07 14:05:27,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:05:27,027 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2019-12-07 14:05:27,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 14:05:27,027 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2019-12-07 14:05:27,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-07 14:05:27,028 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:05:27,028 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:05:27,229 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:27,229 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:05:27,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:05:27,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1062715963, now seen corresponding path program 3 times [2019-12-07 14:05:27,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:05:27,231 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980775290] [2019-12-07 14:05:27,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:05:27,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:27,290 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:05:27,291 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980775290] [2019-12-07 14:05:27,291 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923919232] [2019-12-07 14:05:27,291 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:27,311 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 14:05:27,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:05:27,312 INFO L264 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-07 14:05:27,313 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:05:27,368 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:05:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-12-07 14:05:27,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 14:05:27,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2019-12-07 14:05:27,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971365886] [2019-12-07 14:05:27,382 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 14:05:27,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:05:27,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 14:05:27,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-12-07 14:05:27,383 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand 8 states. [2019-12-07 14:05:27,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:05:27,454 INFO L93 Difference]: Finished difference Result 161 states and 203 transitions. [2019-12-07 14:05:27,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 14:05:27,455 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2019-12-07 14:05:27,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:05:27,457 INFO L225 Difference]: With dead ends: 161 [2019-12-07 14:05:27,457 INFO L226 Difference]: Without dead ends: 159 [2019-12-07 14:05:27,458 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-12-07 14:05:27,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-12-07 14:05:27,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 104. [2019-12-07 14:05:27,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-12-07 14:05:27,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2019-12-07 14:05:27,467 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 21 [2019-12-07 14:05:27,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:05:27,468 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2019-12-07 14:05:27,468 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 14:05:27,468 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2019-12-07 14:05:27,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-07 14:05:27,468 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:05:27,469 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:05:27,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:27,670 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:05:27,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:05:27,670 INFO L82 PathProgramCache]: Analyzing trace with hash 483638269, now seen corresponding path program 1 times [2019-12-07 14:05:27,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:05:27,671 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478126748] [2019-12-07 14:05:27,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:05:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:27,786 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:05:27,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478126748] [2019-12-07 14:05:27,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369506791] [2019-12-07 14:05:27,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:27,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:27,826 INFO L264 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 14:05:27,828 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:05:27,864 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:05:27,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:05:27,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 12 [2019-12-07 14:05:27,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322470918] [2019-12-07 14:05:27,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 14:05:27,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:05:27,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 14:05:27,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-07 14:05:27,865 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand 12 states. [2019-12-07 14:05:27,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:05:27,992 INFO L93 Difference]: Finished difference Result 235 states and 296 transitions. [2019-12-07 14:05:27,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 14:05:27,993 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2019-12-07 14:05:27,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:05:27,994 INFO L225 Difference]: With dead ends: 235 [2019-12-07 14:05:27,994 INFO L226 Difference]: Without dead ends: 166 [2019-12-07 14:05:27,994 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-12-07 14:05:27,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-07 14:05:28,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 125. [2019-12-07 14:05:28,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-07 14:05:28,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 154 transitions. [2019-12-07 14:05:28,004 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 154 transitions. Word has length 21 [2019-12-07 14:05:28,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:05:28,005 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 154 transitions. [2019-12-07 14:05:28,005 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 14:05:28,005 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 154 transitions. [2019-12-07 14:05:28,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-07 14:05:28,006 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:05:28,006 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:05:28,206 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:28,207 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:05:28,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:05:28,207 INFO L82 PathProgramCache]: Analyzing trace with hash 2101787646, now seen corresponding path program 2 times [2019-12-07 14:05:28,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:05:28,208 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604862682] [2019-12-07 14:05:28,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:05:28,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:05:28,281 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604862682] [2019-12-07 14:05:28,281 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116698977] [2019-12-07 14:05:28,281 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:28,302 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 14:05:28,302 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:05:28,302 INFO L264 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 14:05:28,303 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:05:28,320 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-07 14:05:28,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:05:28,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2019-12-07 14:05:28,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413050800] [2019-12-07 14:05:28,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 14:05:28,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:05:28,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 14:05:28,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-12-07 14:05:28,321 INFO L87 Difference]: Start difference. First operand 125 states and 154 transitions. Second operand 12 states. [2019-12-07 14:05:28,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:05:28,533 INFO L93 Difference]: Finished difference Result 359 states and 445 transitions. [2019-12-07 14:05:28,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 14:05:28,534 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2019-12-07 14:05:28,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:05:28,535 INFO L225 Difference]: With dead ends: 359 [2019-12-07 14:05:28,535 INFO L226 Difference]: Without dead ends: 288 [2019-12-07 14:05:28,536 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2019-12-07 14:05:28,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2019-12-07 14:05:28,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 119. [2019-12-07 14:05:28,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-12-07 14:05:28,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 148 transitions. [2019-12-07 14:05:28,544 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 148 transitions. Word has length 24 [2019-12-07 14:05:28,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:05:28,545 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 148 transitions. [2019-12-07 14:05:28,545 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 14:05:28,545 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 148 transitions. [2019-12-07 14:05:28,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-07 14:05:28,545 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:05:28,545 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:05:28,746 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:28,747 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:05:28,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:05:28,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1524556994, now seen corresponding path program 3 times [2019-12-07 14:05:28,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:05:28,747 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547790050] [2019-12-07 14:05:28,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:05:28,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:28,841 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:05:28,841 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547790050] [2019-12-07 14:05:28,842 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192106482] [2019-12-07 14:05:28,842 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:28,876 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-07 14:05:28,877 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:05:28,878 INFO L264 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 14:05:28,879 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:05:28,915 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-12-07 14:05:28,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 14:05:28,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2019-12-07 14:05:28,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257338145] [2019-12-07 14:05:28,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 14:05:28,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:05:28,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 14:05:28,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-12-07 14:05:28,918 INFO L87 Difference]: Start difference. First operand 119 states and 148 transitions. Second operand 4 states. [2019-12-07 14:05:28,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:05:28,965 INFO L93 Difference]: Finished difference Result 239 states and 292 transitions. [2019-12-07 14:05:28,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 14:05:28,965 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2019-12-07 14:05:28,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:05:28,966 INFO L225 Difference]: With dead ends: 239 [2019-12-07 14:05:28,966 INFO L226 Difference]: Without dead ends: 171 [2019-12-07 14:05:28,967 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-12-07 14:05:28,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-12-07 14:05:28,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 125. [2019-12-07 14:05:28,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-07 14:05:28,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 154 transitions. [2019-12-07 14:05:28,972 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 154 transitions. Word has length 24 [2019-12-07 14:05:28,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:05:28,972 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 154 transitions. [2019-12-07 14:05:28,972 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 14:05:28,973 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 154 transitions. [2019-12-07 14:05:28,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-07 14:05:28,973 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:05:28,973 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:05:29,174 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:29,174 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:05:29,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:05:29,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1322786370, now seen corresponding path program 4 times [2019-12-07 14:05:29,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:05:29,175 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278033026] [2019-12-07 14:05:29,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:05:29,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:29,215 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:05:29,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278033026] [2019-12-07 14:05:29,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564896056] [2019-12-07 14:05:29,216 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:29,234 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 14:05:29,234 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:05:29,234 INFO L264 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 14:05:29,235 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:05:29,238 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:05:29,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:05:29,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-12-07 14:05:29,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348906639] [2019-12-07 14:05:29,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 14:05:29,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:05:29,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 14:05:29,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-12-07 14:05:29,239 INFO L87 Difference]: Start difference. First operand 125 states and 154 transitions. Second operand 8 states. [2019-12-07 14:05:29,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:05:29,272 INFO L93 Difference]: Finished difference Result 248 states and 312 transitions. [2019-12-07 14:05:29,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 14:05:29,272 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2019-12-07 14:05:29,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:05:29,274 INFO L225 Difference]: With dead ends: 248 [2019-12-07 14:05:29,274 INFO L226 Difference]: Without dead ends: 166 [2019-12-07 14:05:29,274 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-12-07 14:05:29,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-07 14:05:29,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 146. [2019-12-07 14:05:29,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-07 14:05:29,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 178 transitions. [2019-12-07 14:05:29,283 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 178 transitions. Word has length 24 [2019-12-07 14:05:29,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:05:29,283 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 178 transitions. [2019-12-07 14:05:29,283 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 14:05:29,284 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 178 transitions. [2019-12-07 14:05:29,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-07 14:05:29,284 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:05:29,285 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:05:29,485 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:29,485 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:05:29,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:05:29,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1668645725, now seen corresponding path program 5 times [2019-12-07 14:05:29,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:05:29,486 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784962419] [2019-12-07 14:05:29,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:05:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:29,523 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:05:29,523 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784962419] [2019-12-07 14:05:29,523 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944723143] [2019-12-07 14:05:29,523 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:29,543 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-12-07 14:05:29,543 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:05:29,543 INFO L264 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 14:05:29,544 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:05:29,547 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:05:29,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:05:29,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-12-07 14:05:29,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477382596] [2019-12-07 14:05:29,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 14:05:29,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:05:29,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 14:05:29,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-12-07 14:05:29,548 INFO L87 Difference]: Start difference. First operand 146 states and 178 transitions. Second operand 9 states. [2019-12-07 14:05:29,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:05:29,590 INFO L93 Difference]: Finished difference Result 281 states and 350 transitions. [2019-12-07 14:05:29,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 14:05:29,591 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2019-12-07 14:05:29,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:05:29,592 INFO L225 Difference]: With dead ends: 281 [2019-12-07 14:05:29,592 INFO L226 Difference]: Without dead ends: 187 [2019-12-07 14:05:29,592 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-12-07 14:05:29,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-12-07 14:05:29,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 167. [2019-12-07 14:05:29,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2019-12-07 14:05:29,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 202 transitions. [2019-12-07 14:05:29,598 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 202 transitions. Word has length 27 [2019-12-07 14:05:29,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:05:29,598 INFO L462 AbstractCegarLoop]: Abstraction has 167 states and 202 transitions. [2019-12-07 14:05:29,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 14:05:29,599 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 202 transitions. [2019-12-07 14:05:29,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-07 14:05:29,599 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:05:29,599 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:05:29,800 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:29,800 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:05:29,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:05:29,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1538147426, now seen corresponding path program 6 times [2019-12-07 14:05:29,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:05:29,801 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052990806] [2019-12-07 14:05:29,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:05:29,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:29,890 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:05:29,890 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052990806] [2019-12-07 14:05:29,890 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506194941] [2019-12-07 14:05:29,890 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:29,911 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-07 14:05:29,911 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:05:29,912 INFO L264 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-07 14:05:29,913 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:05:29,959 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:05:29,968 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-12-07 14:05:29,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 14:05:29,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2019-12-07 14:05:29,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301279452] [2019-12-07 14:05:29,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 14:05:29,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:05:29,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 14:05:29,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-07 14:05:29,969 INFO L87 Difference]: Start difference. First operand 167 states and 202 transitions. Second operand 8 states. [2019-12-07 14:05:30,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:05:30,041 INFO L93 Difference]: Finished difference Result 240 states and 288 transitions. [2019-12-07 14:05:30,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 14:05:30,041 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2019-12-07 14:05:30,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:05:30,042 INFO L225 Difference]: With dead ends: 240 [2019-12-07 14:05:30,042 INFO L226 Difference]: Without dead ends: 238 [2019-12-07 14:05:30,043 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-07 14:05:30,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2019-12-07 14:05:30,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 167. [2019-12-07 14:05:30,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2019-12-07 14:05:30,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 202 transitions. [2019-12-07 14:05:30,050 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 202 transitions. Word has length 30 [2019-12-07 14:05:30,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:05:30,050 INFO L462 AbstractCegarLoop]: Abstraction has 167 states and 202 transitions. [2019-12-07 14:05:30,050 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 14:05:30,050 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 202 transitions. [2019-12-07 14:05:30,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-07 14:05:30,051 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:05:30,051 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:05:30,251 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:30,252 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:05:30,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:05:30,252 INFO L82 PathProgramCache]: Analyzing trace with hash 730588260, now seen corresponding path program 1 times [2019-12-07 14:05:30,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:05:30,253 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114517594] [2019-12-07 14:05:30,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:05:30,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:30,299 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-12-07 14:05:30,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114517594] [2019-12-07 14:05:30,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:05:30,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 14:05:30,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754682592] [2019-12-07 14:05:30,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 14:05:30,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:05:30,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 14:05:30,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 14:05:30,301 INFO L87 Difference]: Start difference. First operand 167 states and 202 transitions. Second operand 4 states. [2019-12-07 14:05:30,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:05:30,330 INFO L93 Difference]: Finished difference Result 274 states and 332 transitions. [2019-12-07 14:05:30,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 14:05:30,331 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2019-12-07 14:05:30,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:05:30,333 INFO L225 Difference]: With dead ends: 274 [2019-12-07 14:05:30,333 INFO L226 Difference]: Without dead ends: 179 [2019-12-07 14:05:30,334 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 14:05:30,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-07 14:05:30,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 163. [2019-12-07 14:05:30,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2019-12-07 14:05:30,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 196 transitions. [2019-12-07 14:05:30,357 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 196 transitions. Word has length 30 [2019-12-07 14:05:30,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:05:30,358 INFO L462 AbstractCegarLoop]: Abstraction has 163 states and 196 transitions. [2019-12-07 14:05:30,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 14:05:30,358 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 196 transitions. [2019-12-07 14:05:30,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-12-07 14:05:30,359 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:05:30,359 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 12, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2019-12-07 14:05:30,359 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:05:30,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:05:30,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1716954031, now seen corresponding path program 1 times [2019-12-07 14:05:30,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:05:30,360 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863877163] [2019-12-07 14:05:30,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:05:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 18 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:05:30,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863877163] [2019-12-07 14:05:30,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49318461] [2019-12-07 14:05:30,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:30,543 INFO L264 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-07 14:05:30,544 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:05:30,605 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 163 proven. 70 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-12-07 14:05:30,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:05:30,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10] total 27 [2019-12-07 14:05:30,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219126831] [2019-12-07 14:05:30,606 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-12-07 14:05:30,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:05:30,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-12-07 14:05:30,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2019-12-07 14:05:30,607 INFO L87 Difference]: Start difference. First operand 163 states and 196 transitions. Second operand 27 states. [2019-12-07 14:05:30,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:05:30,898 INFO L93 Difference]: Finished difference Result 381 states and 453 transitions. [2019-12-07 14:05:30,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-07 14:05:30,899 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 57 [2019-12-07 14:05:30,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:05:30,900 INFO L225 Difference]: With dead ends: 381 [2019-12-07 14:05:30,900 INFO L226 Difference]: Without dead ends: 279 [2019-12-07 14:05:30,901 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=579, Invalid=1583, Unknown=0, NotChecked=0, Total=2162 [2019-12-07 14:05:30,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2019-12-07 14:05:30,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 184. [2019-12-07 14:05:30,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2019-12-07 14:05:30,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 220 transitions. [2019-12-07 14:05:30,908 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 220 transitions. Word has length 57 [2019-12-07 14:05:30,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:05:30,908 INFO L462 AbstractCegarLoop]: Abstraction has 184 states and 220 transitions. [2019-12-07 14:05:30,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-12-07 14:05:30,908 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 220 transitions. [2019-12-07 14:05:30,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-12-07 14:05:30,909 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:05:30,909 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 14, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2019-12-07 14:05:31,109 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:31,110 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:05:31,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:05:31,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1043308475, now seen corresponding path program 2 times [2019-12-07 14:05:31,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:05:31,111 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755125720] [2019-12-07 14:05:31,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:05:31,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:31,411 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 20 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:05:31,411 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755125720] [2019-12-07 14:05:31,411 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564462014] [2019-12-07 14:05:31,411 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:31,435 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 14:05:31,435 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:05:31,435 INFO L264 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 14:05:31,437 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:05:31,506 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 210 proven. 92 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-12-07 14:05:31,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:05:31,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11] total 30 [2019-12-07 14:05:31,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011058578] [2019-12-07 14:05:31,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-12-07 14:05:31,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:05:31,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-12-07 14:05:31,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=624, Unknown=0, NotChecked=0, Total=870 [2019-12-07 14:05:31,508 INFO L87 Difference]: Start difference. First operand 184 states and 220 transitions. Second operand 30 states. [2019-12-07 14:05:31,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:05:31,867 INFO L93 Difference]: Finished difference Result 441 states and 518 transitions. [2019-12-07 14:05:31,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-07 14:05:31,868 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 63 [2019-12-07 14:05:31,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:05:31,869 INFO L225 Difference]: With dead ends: 441 [2019-12-07 14:05:31,869 INFO L226 Difference]: Without dead ends: 327 [2019-12-07 14:05:31,870 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=796, Invalid=2174, Unknown=0, NotChecked=0, Total=2970 [2019-12-07 14:05:31,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2019-12-07 14:05:31,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 205. [2019-12-07 14:05:31,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-12-07 14:05:31,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 244 transitions. [2019-12-07 14:05:31,878 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 244 transitions. Word has length 63 [2019-12-07 14:05:31,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:05:31,878 INFO L462 AbstractCegarLoop]: Abstraction has 205 states and 244 transitions. [2019-12-07 14:05:31,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-12-07 14:05:31,878 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 244 transitions. [2019-12-07 14:05:31,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-12-07 14:05:31,879 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:05:31,879 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 16, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2019-12-07 14:05:32,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:32,079 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:05:32,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:05:32,080 INFO L82 PathProgramCache]: Analyzing trace with hash -305796463, now seen corresponding path program 3 times [2019-12-07 14:05:32,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:05:32,080 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415423827] [2019-12-07 14:05:32,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:05:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:32,271 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 22 proven. 479 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:05:32,272 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415423827] [2019-12-07 14:05:32,272 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192689706] [2019-12-07 14:05:32,272 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:32,291 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 14:05:32,291 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:05:32,292 INFO L264 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-07 14:05:32,294 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:05:32,366 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:05:32,383 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 25 proven. 267 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2019-12-07 14:05:32,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:05:32,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 9] total 31 [2019-12-07 14:05:32,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374834376] [2019-12-07 14:05:32,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-12-07 14:05:32,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:05:32,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-12-07 14:05:32,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2019-12-07 14:05:32,384 INFO L87 Difference]: Start difference. First operand 205 states and 244 transitions. Second operand 31 states. [2019-12-07 14:05:35,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:05:35,069 INFO L93 Difference]: Finished difference Result 1317 states and 1526 transitions. [2019-12-07 14:05:35,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2019-12-07 14:05:35,069 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 69 [2019-12-07 14:05:35,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:05:35,073 INFO L225 Difference]: With dead ends: 1317 [2019-12-07 14:05:35,073 INFO L226 Difference]: Without dead ends: 1256 [2019-12-07 14:05:35,081 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12440 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4477, Invalid=25625, Unknown=0, NotChecked=0, Total=30102 [2019-12-07 14:05:35,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2019-12-07 14:05:35,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 526. [2019-12-07 14:05:35,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2019-12-07 14:05:35,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 615 transitions. [2019-12-07 14:05:35,108 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 615 transitions. Word has length 69 [2019-12-07 14:05:35,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:05:35,109 INFO L462 AbstractCegarLoop]: Abstraction has 526 states and 615 transitions. [2019-12-07 14:05:35,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-12-07 14:05:35,109 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 615 transitions. [2019-12-07 14:05:35,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-12-07 14:05:35,110 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:05:35,110 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 16, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:05:35,310 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:35,310 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:05:35,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:05:35,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1470416881, now seen corresponding path program 1 times [2019-12-07 14:05:35,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:05:35,311 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499009501] [2019-12-07 14:05:35,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:05:35,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:35,560 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 106 proven. 395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:05:35,560 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499009501] [2019-12-07 14:05:35,560 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330921128] [2019-12-07 14:05:35,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:35,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:35,589 INFO L264 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 14:05:35,590 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:05:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 263 proven. 117 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-12-07 14:05:35,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:05:35,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 12] total 35 [2019-12-07 14:05:35,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458225398] [2019-12-07 14:05:35,701 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-12-07 14:05:35,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:05:35,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-12-07 14:05:35,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1001, Unknown=0, NotChecked=0, Total=1190 [2019-12-07 14:05:35,702 INFO L87 Difference]: Start difference. First operand 526 states and 615 transitions. Second operand 35 states. [2019-12-07 14:05:36,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:05:36,752 INFO L93 Difference]: Finished difference Result 1047 states and 1217 transitions. [2019-12-07 14:05:36,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-12-07 14:05:36,752 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 69 [2019-12-07 14:05:36,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:05:36,754 INFO L225 Difference]: With dead ends: 1047 [2019-12-07 14:05:36,754 INFO L226 Difference]: Without dead ends: 623 [2019-12-07 14:05:36,757 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3358 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2290, Invalid=7810, Unknown=0, NotChecked=0, Total=10100 [2019-12-07 14:05:36,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2019-12-07 14:05:36,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 353. [2019-12-07 14:05:36,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2019-12-07 14:05:36,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 421 transitions. [2019-12-07 14:05:36,778 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 421 transitions. Word has length 69 [2019-12-07 14:05:36,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:05:36,779 INFO L462 AbstractCegarLoop]: Abstraction has 353 states and 421 transitions. [2019-12-07 14:05:36,779 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-12-07 14:05:36,779 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 421 transitions. [2019-12-07 14:05:36,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-12-07 14:05:36,780 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:05:36,780 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:05:36,980 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:36,981 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:05:36,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:05:36,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1403882695, now seen corresponding path program 2 times [2019-12-07 14:05:36,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:05:36,982 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477187141] [2019-12-07 14:05:36,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:05:36,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:37,257 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 132 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:05:37,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477187141] [2019-12-07 14:05:37,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357179968] [2019-12-07 14:05:37,258 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:37,283 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 14:05:37,284 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:05:37,284 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 14:05:37,285 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:05:37,326 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 5 proven. 151 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2019-12-07 14:05:37,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:05:37,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 7] total 32 [2019-12-07 14:05:37,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164256472] [2019-12-07 14:05:37,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-12-07 14:05:37,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:05:37,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-12-07 14:05:37,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2019-12-07 14:05:37,327 INFO L87 Difference]: Start difference. First operand 353 states and 421 transitions. Second operand 32 states. [2019-12-07 14:05:38,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:05:38,998 INFO L93 Difference]: Finished difference Result 1964 states and 2245 transitions. [2019-12-07 14:05:38,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2019-12-07 14:05:38,999 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 75 [2019-12-07 14:05:38,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:05:39,004 INFO L225 Difference]: With dead ends: 1964 [2019-12-07 14:05:39,004 INFO L226 Difference]: Without dead ends: 1797 [2019-12-07 14:05:39,008 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3540 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2824, Invalid=8948, Unknown=0, NotChecked=0, Total=11772 [2019-12-07 14:05:39,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1797 states. [2019-12-07 14:05:39,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1797 to 641. [2019-12-07 14:05:39,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 641 states. [2019-12-07 14:05:39,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 753 transitions. [2019-12-07 14:05:39,045 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 753 transitions. Word has length 75 [2019-12-07 14:05:39,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:05:39,045 INFO L462 AbstractCegarLoop]: Abstraction has 641 states and 753 transitions. [2019-12-07 14:05:39,045 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-12-07 14:05:39,045 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 753 transitions. [2019-12-07 14:05:39,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-12-07 14:05:39,046 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:05:39,046 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:05:39,247 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:39,247 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:05:39,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:05:39,247 INFO L82 PathProgramCache]: Analyzing trace with hash -961569397, now seen corresponding path program 3 times [2019-12-07 14:05:39,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:05:39,247 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946893336] [2019-12-07 14:05:39,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:05:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:39,480 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 132 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:05:39,480 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946893336] [2019-12-07 14:05:39,480 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062738208] [2019-12-07 14:05:39,480 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:39,499 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 14:05:39,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:05:39,500 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-07 14:05:39,501 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:05:39,626 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:05:39,652 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 28 proven. 326 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2019-12-07 14:05:39,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:05:39,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 9] total 37 [2019-12-07 14:05:39,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103537391] [2019-12-07 14:05:39,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-12-07 14:05:39,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:05:39,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-12-07 14:05:39,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1169, Unknown=0, NotChecked=0, Total=1332 [2019-12-07 14:05:39,653 INFO L87 Difference]: Start difference. First operand 641 states and 753 transitions. Second operand 37 states. [2019-12-07 14:05:44,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:05:44,235 INFO L93 Difference]: Finished difference Result 2159 states and 2439 transitions. [2019-12-07 14:05:44,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2019-12-07 14:05:44,236 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 75 [2019-12-07 14:05:44,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:05:44,243 INFO L225 Difference]: With dead ends: 2159 [2019-12-07 14:05:44,243 INFO L226 Difference]: Without dead ends: 1843 [2019-12-07 14:05:44,245 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18603 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=6504, Invalid=40368, Unknown=0, NotChecked=0, Total=46872 [2019-12-07 14:05:44,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1843 states. [2019-12-07 14:05:44,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1843 to 866. [2019-12-07 14:05:44,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 866 states. [2019-12-07 14:05:44,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1008 transitions. [2019-12-07 14:05:44,302 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1008 transitions. Word has length 75 [2019-12-07 14:05:44,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:05:44,303 INFO L462 AbstractCegarLoop]: Abstraction has 866 states and 1008 transitions. [2019-12-07 14:05:44,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-12-07 14:05:44,303 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1008 transitions. [2019-12-07 14:05:44,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-12-07 14:05:44,304 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:05:44,304 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 18, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:05:44,504 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:44,505 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:05:44,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:05:44,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1379949895, now seen corresponding path program 4 times [2019-12-07 14:05:44,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:05:44,506 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773714719] [2019-12-07 14:05:44,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:05:44,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:44,680 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 304 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:05:44,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773714719] [2019-12-07 14:05:44,681 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216803923] [2019-12-07 14:05:44,681 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:44,701 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 14:05:44,701 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:05:44,701 INFO L264 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-07 14:05:44,702 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:05:44,827 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 451 proven. 39 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-12-07 14:05:44,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:05:44,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14] total 39 [2019-12-07 14:05:44,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904548024] [2019-12-07 14:05:44,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-12-07 14:05:44,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:05:44,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-12-07 14:05:44,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1150, Unknown=0, NotChecked=0, Total=1482 [2019-12-07 14:05:44,828 INFO L87 Difference]: Start difference. First operand 866 states and 1008 transitions. Second operand 39 states. [2019-12-07 14:05:46,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:05:46,345 INFO L93 Difference]: Finished difference Result 1957 states and 2278 transitions. [2019-12-07 14:05:46,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2019-12-07 14:05:46,346 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 75 [2019-12-07 14:05:46,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:05:46,350 INFO L225 Difference]: With dead ends: 1957 [2019-12-07 14:05:46,350 INFO L226 Difference]: Without dead ends: 1460 [2019-12-07 14:05:46,352 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4138 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1548, Invalid=10884, Unknown=0, NotChecked=0, Total=12432 [2019-12-07 14:05:46,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2019-12-07 14:05:46,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1178. [2019-12-07 14:05:46,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1178 states. [2019-12-07 14:05:46,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1364 transitions. [2019-12-07 14:05:46,419 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1364 transitions. Word has length 75 [2019-12-07 14:05:46,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:05:46,419 INFO L462 AbstractCegarLoop]: Abstraction has 1178 states and 1364 transitions. [2019-12-07 14:05:46,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-12-07 14:05:46,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1364 transitions. [2019-12-07 14:05:46,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-12-07 14:05:46,421 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:05:46,421 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 20, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:05:46,621 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:46,621 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:05:46,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:05:46,622 INFO L82 PathProgramCache]: Analyzing trace with hash -2097897522, now seen corresponding path program 5 times [2019-12-07 14:05:46,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:05:46,622 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42436141] [2019-12-07 14:05:46,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:05:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:46,763 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 353 proven. 324 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 14:05:46,763 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42436141] [2019-12-07 14:05:46,763 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795968786] [2019-12-07 14:05:46,763 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:46,792 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-12-07 14:05:46,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:05:46,793 INFO L264 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-07 14:05:46,794 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:05:46,800 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 353 proven. 176 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2019-12-07 14:05:46,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:05:46,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14] total 26 [2019-12-07 14:05:46,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147517206] [2019-12-07 14:05:46,801 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-07 14:05:46,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:05:46,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-07 14:05:46,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2019-12-07 14:05:46,802 INFO L87 Difference]: Start difference. First operand 1178 states and 1364 transitions. Second operand 26 states. [2019-12-07 14:05:47,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:05:47,069 INFO L93 Difference]: Finished difference Result 2214 states and 2607 transitions. [2019-12-07 14:05:47,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-07 14:05:47,069 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 78 [2019-12-07 14:05:47,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:05:47,073 INFO L225 Difference]: With dead ends: 2214 [2019-12-07 14:05:47,073 INFO L226 Difference]: Without dead ends: 1147 [2019-12-07 14:05:47,074 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=460, Invalid=946, Unknown=0, NotChecked=0, Total=1406 [2019-12-07 14:05:47,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2019-12-07 14:05:47,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 936. [2019-12-07 14:05:47,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 936 states. [2019-12-07 14:05:47,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1079 transitions. [2019-12-07 14:05:47,118 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1079 transitions. Word has length 78 [2019-12-07 14:05:47,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:05:47,118 INFO L462 AbstractCegarLoop]: Abstraction has 936 states and 1079 transitions. [2019-12-07 14:05:47,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-12-07 14:05:47,119 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1079 transitions. [2019-12-07 14:05:47,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-12-07 14:05:47,119 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:05:47,119 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:05:47,320 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:47,320 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:05:47,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:05:47,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1325122485, now seen corresponding path program 6 times [2019-12-07 14:05:47,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:05:47,321 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050584732] [2019-12-07 14:05:47,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:05:47,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:47,580 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 436 proven. 446 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:05:47,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050584732] [2019-12-07 14:05:47,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090249417] [2019-12-07 14:05:47,580 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:47,602 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-07 14:05:47,602 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:05:47,602 INFO L264 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-07 14:05:47,603 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:05:47,685 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:05:47,707 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 34 proven. 462 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2019-12-07 14:05:47,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:05:47,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 9] total 38 [2019-12-07 14:05:47,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455915293] [2019-12-07 14:05:47,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-12-07 14:05:47,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:05:47,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-12-07 14:05:47,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=1048, Unknown=0, NotChecked=0, Total=1406 [2019-12-07 14:05:47,708 INFO L87 Difference]: Start difference. First operand 936 states and 1079 transitions. Second operand 38 states. [2019-12-07 14:05:50,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:05:50,603 INFO L93 Difference]: Finished difference Result 1409 states and 1601 transitions. [2019-12-07 14:05:50,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2019-12-07 14:05:50,603 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 87 [2019-12-07 14:05:50,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:05:50,607 INFO L225 Difference]: With dead ends: 1409 [2019-12-07 14:05:50,608 INFO L226 Difference]: Without dead ends: 1351 [2019-12-07 14:05:50,609 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9891 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2853, Invalid=21953, Unknown=0, NotChecked=0, Total=24806 [2019-12-07 14:05:50,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2019-12-07 14:05:50,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 985. [2019-12-07 14:05:50,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 985 states. [2019-12-07 14:05:50,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1136 transitions. [2019-12-07 14:05:50,655 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1136 transitions. Word has length 87 [2019-12-07 14:05:50,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:05:50,655 INFO L462 AbstractCegarLoop]: Abstraction has 985 states and 1136 transitions. [2019-12-07 14:05:50,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-12-07 14:05:50,655 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1136 transitions. [2019-12-07 14:05:50,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-12-07 14:05:50,657 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:05:50,657 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 33, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2019-12-07 14:05:50,857 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:50,857 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:05:50,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:05:50,858 INFO L82 PathProgramCache]: Analyzing trace with hash -223846065, now seen corresponding path program 4 times [2019-12-07 14:05:50,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:05:50,858 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152416500] [2019-12-07 14:05:50,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:05:50,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:51,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 40 proven. 1976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:05:51,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152416500] [2019-12-07 14:05:51,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457291768] [2019-12-07 14:05:51,345 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:51,374 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 14:05:51,374 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:05:51,375 INFO L264 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 14:05:51,376 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:05:51,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 916 proven. 210 refuted. 0 times theorem prover too weak. 890 trivial. 0 not checked. [2019-12-07 14:05:51,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:05:51,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 15] total 56 [2019-12-07 14:05:51,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838397319] [2019-12-07 14:05:51,566 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-12-07 14:05:51,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:05:51,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-12-07 14:05:51,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=2489, Unknown=0, NotChecked=0, Total=3080 [2019-12-07 14:05:51,566 INFO L87 Difference]: Start difference. First operand 985 states and 1136 transitions. Second operand 56 states. [2019-12-07 14:05:53,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:05:53,078 INFO L93 Difference]: Finished difference Result 2280 states and 2613 transitions. [2019-12-07 14:05:53,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-12-07 14:05:53,079 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 129 [2019-12-07 14:05:53,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:05:53,083 INFO L225 Difference]: With dead ends: 2280 [2019-12-07 14:05:53,083 INFO L226 Difference]: Without dead ends: 1452 [2019-12-07 14:05:53,084 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2201 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1616, Invalid=6574, Unknown=0, NotChecked=0, Total=8190 [2019-12-07 14:05:53,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2019-12-07 14:05:53,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 993. [2019-12-07 14:05:53,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 993 states. [2019-12-07 14:05:53,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1144 transitions. [2019-12-07 14:05:53,135 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1144 transitions. Word has length 129 [2019-12-07 14:05:53,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:05:53,135 INFO L462 AbstractCegarLoop]: Abstraction has 993 states and 1144 transitions. [2019-12-07 14:05:53,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-12-07 14:05:53,135 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1144 transitions. [2019-12-07 14:05:53,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-12-07 14:05:53,137 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:05:53,137 INFO L410 BasicCegarLoop]: trace histogram [39, 39, 36, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2019-12-07 14:05:53,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:53,337 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:05:53,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:05:53,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1824110052, now seen corresponding path program 5 times [2019-12-07 14:05:53,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:05:53,338 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812769644] [2019-12-07 14:05:53,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:05:53,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:53,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2358 backedges. 42 proven. 2316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:05:53,932 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812769644] [2019-12-07 14:05:53,932 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405214499] [2019-12-07 14:05:53,932 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:53,973 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-12-07 14:05:53,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:05:53,974 INFO L264 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-07 14:05:53,975 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:05:54,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2358 backedges. 1156 proven. 222 refuted. 0 times theorem prover too weak. 980 trivial. 0 not checked. [2019-12-07 14:05:54,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:05:54,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 18] total 63 [2019-12-07 14:05:54,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840031977] [2019-12-07 14:05:54,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-12-07 14:05:54,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:05:54,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-12-07 14:05:54,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=3388, Unknown=0, NotChecked=0, Total=3906 [2019-12-07 14:05:54,276 INFO L87 Difference]: Start difference. First operand 993 states and 1144 transitions. Second operand 63 states. [2019-12-07 14:05:56,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:05:56,052 INFO L93 Difference]: Finished difference Result 4408 states and 4966 transitions. [2019-12-07 14:05:56,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-12-07 14:05:56,052 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 138 [2019-12-07 14:05:56,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:05:56,064 INFO L225 Difference]: With dead ends: 4408 [2019-12-07 14:05:56,064 INFO L226 Difference]: Without dead ends: 3813 [2019-12-07 14:05:56,065 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2233 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1100, Invalid=7090, Unknown=0, NotChecked=0, Total=8190 [2019-12-07 14:05:56,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2019-12-07 14:05:56,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 2122. [2019-12-07 14:05:56,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2122 states. [2019-12-07 14:05:56,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2122 states to 2122 states and 2379 transitions. [2019-12-07 14:05:56,185 INFO L78 Accepts]: Start accepts. Automaton has 2122 states and 2379 transitions. Word has length 138 [2019-12-07 14:05:56,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:05:56,185 INFO L462 AbstractCegarLoop]: Abstraction has 2122 states and 2379 transitions. [2019-12-07 14:05:56,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-12-07 14:05:56,185 INFO L276 IsEmpty]: Start isEmpty. Operand 2122 states and 2379 transitions. [2019-12-07 14:05:56,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-12-07 14:05:56,188 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:05:56,188 INFO L410 BasicCegarLoop]: trace histogram [39, 39, 36, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2019-12-07 14:05:56,389 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:56,389 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:05:56,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:05:56,389 INFO L82 PathProgramCache]: Analyzing trace with hash -533651168, now seen corresponding path program 6 times [2019-12-07 14:05:56,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:05:56,390 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259212264] [2019-12-07 14:05:56,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:05:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:05:56,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2358 backedges. 82 proven. 2272 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 14:05:56,919 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259212264] [2019-12-07 14:05:56,919 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384987860] [2019-12-07 14:05:56,919 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:05:56,941 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-07 14:05:56,942 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:05:56,942 INFO L264 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-07 14:05:56,943 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:05:56,963 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:05:57,029 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:05:57,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2358 backedges. 1115 proven. 1 refuted. 0 times theorem prover too weak. 1242 trivial. 0 not checked. [2019-12-07 14:05:57,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:05:57,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 8] total 51 [2019-12-07 14:05:57,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921251798] [2019-12-07 14:05:57,056 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-12-07 14:05:57,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:05:57,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-12-07 14:05:57,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=2184, Unknown=0, NotChecked=0, Total=2550 [2019-12-07 14:05:57,057 INFO L87 Difference]: Start difference. First operand 2122 states and 2379 transitions. Second operand 51 states. [2019-12-07 14:06:04,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:06:04,118 INFO L93 Difference]: Finished difference Result 5116 states and 5832 transitions. [2019-12-07 14:06:04,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2019-12-07 14:06:04,118 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 138 [2019-12-07 14:06:04,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:06:04,119 INFO L225 Difference]: With dead ends: 5116 [2019-12-07 14:06:04,119 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 14:06:04,124 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17113 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=11925, Invalid=34947, Unknown=0, NotChecked=0, Total=46872 [2019-12-07 14:06:04,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 14:06:04,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 14:06:04,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 14:06:04,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 14:06:04,125 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 138 [2019-12-07 14:06:04,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:06:04,125 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 14:06:04,125 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-12-07 14:06:04,125 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 14:06:04,125 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 14:06:04,325 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:06:04,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 14:07:18,811 WARN L192 SmtUtils]: Spent 1.24 m on a formula simplification. DAG size of input: 4362 DAG size of output: 3041 [2019-12-07 14:07:19,331 WARN L192 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 270 [2019-12-07 14:08:27,975 WARN L192 SmtUtils]: Spent 1.14 m on a formula simplification. DAG size of input: 2901 DAG size of output: 135 [2019-12-07 14:08:28,679 WARN L192 SmtUtils]: Spent 702.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 17 [2019-12-07 14:08:28,682 INFO L246 CegarLoopResult]: For program point L23-1(lines 19 29) no Hoare annotation was computed. [2019-12-07 14:08:28,682 INFO L246 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2019-12-07 14:08:28,682 INFO L246 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2019-12-07 14:08:28,682 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 14:08:28,682 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-12-07 14:08:28,682 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 11) no Hoare annotation was computed. [2019-12-07 14:08:28,682 INFO L246 CegarLoopResult]: For program point L16(lines 16 30) no Hoare annotation was computed. [2019-12-07 14:08:28,682 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 14:08:28,682 INFO L246 CegarLoopResult]: For program point L21-2(lines 21 22) no Hoare annotation was computed. [2019-12-07 14:08:28,683 INFO L242 CegarLoopResult]: At program point L21-3(lines 21 22) the Hoare annotation is: (let ((.cse22 (+ (* 3 ~last~0) ULTIMATE.start_main_~c~0)) (.cse34 (+ ~last~0 1)) (.cse33 (+ ~last~0 ULTIMATE.start_main_~c~0))) (let ((.cse7 (<= 5 ULTIMATE.start_main_~c~0)) (.cse13 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 2))) (.cse20 (<= 2 ULTIMATE.start_main_~c~0)) (.cse21 (<= .cse33 3)) (.cse28 (<= 0 ULTIMATE.start_main_~c~0)) (.cse27 (< ULTIMATE.start_main_~c~0 200000)) (.cse11 (<= ULTIMATE.start_main_~c~0 .cse34)) (.cse30 (<= .cse22 13)) (.cse23 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 7))) (.cse26 (<= 1 ULTIMATE.start_main_~st~0)) (.cse12 (<= 1 ULTIMATE.start_main_~c~0)) (.cse14 (<= ULTIMATE.start_main_~c~0 7)) (.cse16 (<= 7 ULTIMATE.start_main_~c~0)) (.cse15 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 4))) (.cse29 (<= 4 ULTIMATE.start_main_~c~0)) (.cse24 (<= 3 ULTIMATE.start_main_~c~0)) (.cse18 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 6))) (.cse6 (= ULTIMATE.start_main_~b~0 0)) (.cse17 (<= 6 ULTIMATE.start_main_~c~0)) (.cse32 (<= ULTIMATE.start_main_~c~0 6)) (.cse25 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 3))) (.cse19 (<= ~last~0 2)) (.cse31 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 8))) (.cse0 (= ULTIMATE.start_main_~a~0 0)) (.cse8 (<= 9 ULTIMATE.start_main_~c~0)) (.cse10 (<= ULTIMATE.start_main_~c~0 200000)) (.cse1 (<= ULTIMATE.start_main_~c~0 (+ ~last~0 5))) (.cse2 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~a~0)) (.cse9 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse3 (<= 8 ULTIMATE.start_main_~c~0)) (.cse4 (<= ULTIMATE.start_main_~c~0 8)) (.cse5 (<= .cse34 ULTIMATE.start_main_~c~0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5) (and .cse6 .cse0 .cse1 (<= ULTIMATE.start_main_~c~0 5) .cse5 .cse7) (and .cse2 .cse8 .cse9 .cse5 .cse10) (and .cse0 .cse2 .cse11 .cse5 .cse12 (<= ~last~0 199999)) (and .cse2 .cse13 .cse9 .cse5 .cse7 .cse10) (and .cse2 .cse14 .cse15 .cse9 .cse5 .cse16) (and .cse6 .cse0 .cse17 .cse18 .cse19) (and .cse2 .cse13 .cse20 .cse9 .cse21) (and .cse0 .cse2 .cse16 (<= .cse22 17) .cse23) (and .cse6 .cse0 .cse24 (<= ULTIMATE.start_main_~c~0 3) .cse5 .cse25) (and .cse24 .cse26 .cse2 .cse9 .cse10) (and .cse1 (<= .cse22 11) .cse2 .cse9 .cse7) (and .cse0 .cse26 .cse2 .cse20 .cse10) (and .cse26 .cse2 .cse20 .cse9 .cse27) (and .cse26 (<= ULTIMATE.start_main_~c~0 0) .cse2 .cse28 .cse9) (and .cse6 .cse0 .cse13 .cse20 .cse21) (and .cse2 .cse15 .cse9 .cse19 .cse29) (and .cse0 .cse26 .cse2 .cse28 .cse27) (and .cse2 .cse11 .cse9 .cse5 .cse30 .cse12) (and .cse2 .cse9 .cse30 .cse16 .cse23) (and .cse6 .cse0 .cse3 .cse19 .cse31) (and (<= ULTIMATE.start_main_~c~0 1) .cse26 .cse2 .cse9 .cse12) (and .cse0 .cse2 .cse14 .cse5 .cse16 .cse25) (and .cse6 .cse0 .cse15 .cse19 .cse29) (and .cse2 .cse17 .cse9 .cse32 .cse5 .cse25) (and (<= .cse33 5) .cse24 .cse2 .cse9 .cse25) (and .cse2 .cse17 .cse18 .cse9 .cse19) (and .cse6 .cse0 .cse17 .cse32 .cse5 .cse25) (and .cse2 .cse3 .cse9 .cse19 .cse31) (and .cse0 .cse2 .cse8 .cse5 .cse10) (and .cse1 .cse2 .cse9 .cse3 .cse4 .cse5)))) [2019-12-07 14:08:28,683 INFO L246 CegarLoopResult]: For program point L21-4(lines 19 29) no Hoare annotation was computed. [2019-12-07 14:08:28,683 INFO L246 CegarLoopResult]: For program point L26-1(lines 26 27) no Hoare annotation was computed. [2019-12-07 14:08:28,683 INFO L246 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2019-12-07 14:08:28,683 INFO L246 CegarLoopResult]: For program point L10(lines 10 12) no Hoare annotation was computed. [2019-12-07 14:08:28,684 INFO L242 CegarLoopResult]: At program point L10-2(lines 9 29) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~a~0))) (or (and .cse0 (<= 200000 ULTIMATE.start_main_~c~0) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= ULTIMATE.start_main_~c~0 200000)) (and (= ULTIMATE.start_main_~a~0 0) (<= ULTIMATE.start_main_~c~0 0) .cse0 (<= 0 ULTIMATE.start_main_~c~0)))) [2019-12-07 14:08:28,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 02:08:28 BoogieIcfgContainer [2019-12-07 14:08:28,709 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 14:08:28,709 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 14:08:28,709 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 14:08:28,709 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 14:08:28,710 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:05:25" (3/4) ... [2019-12-07 14:08:28,712 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 14:08:28,718 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-12-07 14:08:28,718 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 14:08:28,746 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_bc30ddd8-e21d-4c76-a035-e22c8d9496e8/bin/uautomizer/witness.graphml [2019-12-07 14:08:28,746 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 14:08:28,747 INFO L168 Benchmark]: Toolchain (without parser) took 184106.29 ms. Allocated memory was 1.0 GB in the beginning and 2.8 GB in the end (delta: 1.8 GB). Free memory was 940.9 MB in the beginning and 1.4 GB in the end (delta: -472.0 MB). Peak memory consumption was 1.3 GB. Max. memory is 11.5 GB. [2019-12-07 14:08:28,747 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 955.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 14:08:28,747 INFO L168 Benchmark]: CACSL2BoogieTranslator took 177.05 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 100.1 MB). Free memory was 940.9 MB in the beginning and 1.1 GB in the end (delta: -154.0 MB). Peak memory consumption was 23.5 MB. Max. memory is 11.5 GB. [2019-12-07 14:08:28,747 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.27 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 14:08:28,747 INFO L168 Benchmark]: Boogie Preprocessor took 13.71 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 14:08:28,748 INFO L168 Benchmark]: RCFGBuilder took 162.15 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. [2019-12-07 14:08:28,748 INFO L168 Benchmark]: TraceAbstraction took 183691.25 ms. Allocated memory was 1.1 GB in the beginning and 2.8 GB in the end (delta: 1.7 GB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -347.1 MB). Peak memory consumption was 2.8 GB. Max. memory is 11.5 GB. [2019-12-07 14:08:28,748 INFO L168 Benchmark]: Witness Printer took 36.57 ms. Allocated memory is still 2.8 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 11.5 GB. [2019-12-07 14:08:28,749 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 955.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 177.05 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 100.1 MB). Free memory was 940.9 MB in the beginning and 1.1 GB in the end (delta: -154.0 MB). Peak memory consumption was 23.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 22.27 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.71 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 162.15 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 183691.25 ms. Allocated memory was 1.1 GB in the beginning and 2.8 GB in the end (delta: 1.7 GB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -347.1 MB). Peak memory consumption was 2.8 GB. Max. memory is 11.5 GB. * Witness Printer took 36.57 ms. Allocated memory is still 2.8 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 11]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((a == 0 && c <= last + 5) && b == a) && 8 <= c) && c <= 8) && last + 1 <= c) || (((((b == 0 && a == 0) && c <= last + 5) && c <= 5) && last + 1 <= c) && 5 <= c)) || ((((b == a && 9 <= c) && 1 == cond) && last + 1 <= c) && c <= 200000)) || (((((a == 0 && b == a) && c <= last + 1) && last + 1 <= c) && 1 <= c) && last <= 199999)) || (((((b == a && c <= last + 2) && 1 == cond) && last + 1 <= c) && 5 <= c) && c <= 200000)) || (((((b == a && c <= 7) && c <= last + 4) && 1 == cond) && last + 1 <= c) && 7 <= c)) || ((((b == 0 && a == 0) && 6 <= c) && c <= last + 6) && last <= 2)) || ((((b == a && c <= last + 2) && 2 <= c) && 1 == cond) && last + c <= 3)) || ((((a == 0 && b == a) && 7 <= c) && 3 * last + c <= 17) && c <= last + 7)) || (((((b == 0 && a == 0) && 3 <= c) && c <= 3) && last + 1 <= c) && c <= last + 3)) || ((((3 <= c && 1 <= st) && b == a) && 1 == cond) && c <= 200000)) || ((((c <= last + 5 && 3 * last + c <= 11) && b == a) && 1 == cond) && 5 <= c)) || ((((a == 0 && 1 <= st) && b == a) && 2 <= c) && c <= 200000)) || ((((1 <= st && b == a) && 2 <= c) && 1 == cond) && c < 200000)) || ((((1 <= st && c <= 0) && b == a) && 0 <= c) && 1 == cond)) || ((((b == 0 && a == 0) && c <= last + 2) && 2 <= c) && last + c <= 3)) || ((((b == a && c <= last + 4) && 1 == cond) && last <= 2) && 4 <= c)) || ((((a == 0 && 1 <= st) && b == a) && 0 <= c) && c < 200000)) || (((((b == a && c <= last + 1) && 1 == cond) && last + 1 <= c) && 3 * last + c <= 13) && 1 <= c)) || ((((b == a && 1 == cond) && 3 * last + c <= 13) && 7 <= c) && c <= last + 7)) || ((((b == 0 && a == 0) && 8 <= c) && last <= 2) && c <= last + 8)) || ((((c <= 1 && 1 <= st) && b == a) && 1 == cond) && 1 <= c)) || (((((a == 0 && b == a) && c <= 7) && last + 1 <= c) && 7 <= c) && c <= last + 3)) || ((((b == 0 && a == 0) && c <= last + 4) && last <= 2) && 4 <= c)) || (((((b == a && 6 <= c) && 1 == cond) && c <= 6) && last + 1 <= c) && c <= last + 3)) || ((((last + c <= 5 && 3 <= c) && b == a) && 1 == cond) && c <= last + 3)) || ((((b == a && 6 <= c) && c <= last + 6) && 1 == cond) && last <= 2)) || (((((b == 0 && a == 0) && 6 <= c) && c <= 6) && last + 1 <= c) && c <= last + 3)) || ((((b == a && 8 <= c) && 1 == cond) && last <= 2) && c <= last + 8)) || ((((a == 0 && b == a) && 9 <= c) && last + 1 <= c) && c <= 200000)) || (((((c <= last + 5 && b == a) && 1 == cond) && 8 <= c) && c <= 8) && last + 1 <= c) - InvariantResult [Line: 9]: Loop Invariant Derived loop invariant: (((b == a && 200000 <= c) && 1 == cond) && c <= 200000) || (((a == 0 && c <= 0) && b == a) && 0 <= c) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. Result: SAFE, OverallTime: 39.2s, OverallIterations: 27, TraceHistogramMax: 39, AutomataDifference: 26.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 144.3s, HoareTripleCheckerStatistics: 490 SDtfs, 3149 SDslu, 3228 SDs, 0 SdLazy, 17857 SolverSat, 1034 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2768 GetRequests, 1260 SyntacticMatches, 0 SemanticMatches, 1508 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75577 ImplicationChecksByTransitivity, 22.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2122occurred in iteration=26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 27 MinimizatonAttempts, 6868 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 1519 NumberOfFragments, 651 HoareAnnotationTreeSize, 2 FomulaSimplifications, 21430519314 FormulaSimplificationTreeSizeReduction, 74.9s HoareSimplificationTime, 2 FomulaSimplificationsInter, 113639302 FormulaSimplificationTreeSizeReductionInter, 69.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.5s InterpolantComputationTime, 2661 NumberOfCodeBlocks, 2318 NumberOfCodeBlocksAsserted, 119 NumberOfCheckSat, 2609 ConstructedInterpolants, 0 QuantifiedInterpolants, 837811 SizeOfPredicates, 69 NumberOfNonLiveVariables, 2045 ConjunctsInSsa, 262 ConjunctsInUnsatCore, 52 InterpolantComputations, 7 PerfectInterpolantSequences, 11626/24362 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...